mbed-BoB
Just a few short notes about the Break out Board (BoB) I've recently put together for the mbed microcontroller. See picture below (click for bigger pic) :
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| mbed-BoB Photo |
This was based on the original caputure which can be found at :
In the end, it boiled down to two rules to observe
- We're not trying to break out any other ICs or parts, just providing connectivity
- We only want to add connectors that will not interfere with the pins if they are not in use
This meant all the bluetooth, zigbee, speaker etc wasn't really appropriate, and connectors that require filter/driver circuits were also out.
The feature set we have is a good compromise.
Features
- mbed socket
- Ethernet socket
- USB Socket
- MicroSD card socket
- 2 push buttons
- 2-way DIP switch
- 3.5mm analog in socket
- 3.5mm analog out socket
- 6 PWM + Power headers
- 12mm Coin cell holder
- 4xAA battery box
- 2.1mm DC Jack socket
- Power Over Ethernet support
- 2x5 header exposing all 5 power sources
- Polyfuse protection
- Power switch
Connectivity
| Pinout | Board Map |
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Schematics
Layout
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| mbed-BoB layout |
Bill of Materials
| Component | Description | Supplier | Part No. | Notes |
| BAT1 | BATTERY4XAA | Rapid | 18-3687 | |
| BAT2 | BATTERY12MMCOINCELL | Rapid | 18-3610 | |
| C1,2 | 10uF | They're just caps | ||
| C4 | 470uF | They're just caps | ||
| CON1 | USB-B-H | Rapid | 24-0346 | |
| CON2 | RJ45_POE | Farnell | 1284349 | |
| CON3 | DC_JACK | Rapid | 20-0975 | |
| CON4,5 | AUDIO_JACK | Rapid | 20-0137 | |
| CON6 | SF-MICROSD | Farnell | 1366700 | |
| D1-5 | BAT60A | Digikey | BAT60AE6327INCT-ND | |
| F1,2 | 1.85A | Rapid | 26-4622 | |
| IC1 | MBED-SOCKET | Rapid | 22-5144 | |
| J1-6 | PINHD-1X3 | Rapid | They're just pin headers | |
| JP1 | PINHD-1X2 | Rapid | They're just pin headers | |
| R1-4 | 4k7 | They're just resistos | ||
| SW1 | SLIDE_DPDT | Rapid | 76-0220 | |
| SW2 | DIL_2W | Rapid | 80-0300 | |
| SW3,4 | BUTTON | Rapid | 78-0620 | |
| U2 | POE | DIP Intl | Silvertel AG9405S |
- Rapid Electronics
- Farnell
- DIP International - Contact Katrina Hyman (katrinahyman@…)
Experiences
The following pages describe experiences building and using the mbed BoB:-
- Initial construction - First time build experience.